Influence of cellulose ethers on hydration products of portland cement
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Cellulose ethers are widely used to mortar formulations, and it is significant to understand the interaction between cellulose ethers and cement pastes. FT-IR spectra, thermal analysis and SEM are used to investigate hydration products in the cement pastes modified by HEMC and HPMC in this article. The results show that the hydration products in modified cement pastes were finally identical with those in the unmodified cement paste, but the major hydration products, such as CH (calcium hydroxide), ettringite and C-S-H, appeared later in the modified cement pastes than in the unmodified cement paste. The cellulose ethers decrease the outer products and increase inner products of C-S-H gels. Compared to unmodified cement pastes, no new products are found in the modified cement pastes in the present experiment. The HEMC and HPMC investigation shows almost the same influence on the hydration products of Portland cement.
Key wordscellulose ethers hydration product portland cement
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- N K Singh, P C Mishra, V K Singh, et al. Effects of Hydroxyethyl Cellulose and Oxalic Acid on the Properties of Cement[J]. Cement and Concrete Research, 2003, 33(9):1 319–1 329Google Scholar
- G F Zhang, P M Wang. Effect of Hydroxyethyl Methyl Cellulose on Cement Paste Hydration[J]. Journal of Tongji University (Natural Science), 2009, 37(3): 369–373Google Scholar
- H F W Taylor. Cement Chemistry[M]. New York: Academic Press, 1997Google Scholar
- J Bensted, S P Varma. Some Applications of Infrared and Raman Spectroscopy in Cement Chemistry[J]. Cement Technology, 1974, 5(5): 440–445:448–450Google Scholar
- D A Silva, H R Roman, V M John. Effects of EVA and HEC Polymers on the Portland Cement Hydration[C]. Proceedings of 11th Congress on Polymers in Concrete, Berlin, 2004Google Scholar